CVE-2026-45659

HIGH

Microsoft SharePoint Remote Code Execution Vulnerability

Title source: cna
STIX 2.1

Description

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory patch
Microsoft SharePoint Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45659

Scores

CVSS v3 8.8
EPSS 0.0050
EPSS Percentile 66.3%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Details

CWE
CWE-502
Status published
Products (3)
Microsoft/Microsoft SharePoint Enterprise Server 2016 16.0.0 - 16.0.5552.1002
Microsoft/Microsoft SharePoint Server 2019 16.0.0 - 16.0.10417.20128
Microsoft/Microsoft SharePoint Server Subscription Edition 16.0.0 - 16.0.19725.20280
Published May 22, 2026
Tracked Since May 23, 2026